Page-end lock for type-writers.



C. E. SMITH PAGE END LOCK FOR TYPE WRLTERS. APPLIQATION r1151 MAR- 19. 1913. RENEWED JULY 11, 1914.

1,169,5W. v Patented Jan. 25, 1916.

V Him-"g.

' 51mm I 71 5 q 11" mwksz'amlm 'UNETEElTATE%lRATEEZ CHARLES E. SMITH, NEW "YORK, N. '51., ASSIGNOR TO UNDER-W081 TYPE'VTRITER COMPANY, OF NEW YORK, N. Y., A CORPQRATION OF DELAWARE.

PAGE-END LOCK FOR TYPE-WRITERS.

income;

Specification of Letters Patent.

flat ented Jan. 1533165.

' Application filed March 19, 1913, Serial No. 755,369. Renewed July '11, 1914. Serial No, 850.351.

To all lIf/LOI'IL it may concern:

Be it known that l, ,Cnannns E. SMITH,

a British subject, residing at New York, in the county of New York and State of New York, have "invented new and usetul lmprovemcnts in Page-End Locks for Type- Writers, of which the following is a specification.

The object of this invention is to provide a typewriter attachment, known in the art as a Wage-end lock, which shall be simple in construction, which may be applied to any typewriter on the market, and which is thoroughly eiiicient for the purposes intended, 1.. 6., to lock the. typewriter platen against movement at a predetermined stage or period in the linespacing movement of the tyraawriter, so that a predetermined margin on the lower end of the typewriting sheet may be maintained.

Another object of the invention is to provide means for locking the platen against line-spacing movement, at variable predetermined periods or stages in the line-spacing movement of the typewriter.

Another object of the invention is to provide means, operative when the page-end locking mechanism becomes initially active, to indicate, visually, to the operator how many line-spacing movements of the typewriter will take place before the page-end lockin mechanism will. finall' lock the I! a v platen against any further movement.

Vl'ith these objects in View, and others appearing" as the specification proceeds and the nature of the invention more fully appears, the invention resides in the novel construction, combination and arrangement of parts, as fully hereinafter described in the specification, summed up in the claims, and illustrated in the drawing.

In the accompanying drawing, have illustrated. as an example merely, a form of l mhod ment of my invention ca 'iable of carrying out the underlying principles there of; it being understood, of course, that the exemplified vform is susceptible of many cl'ianges, without departing" from the spirit of the invention or sacrificing any of its advantages, and that all such changes as come within the scope of the appended claims are within the purview of this application.

In the accom 'ianying drawing, in which like reference-charracters denote corresponding! pa rts throughout the several views: ,Fifflil'O l is a tran-nnentary perspective View of much of a typewriter as is necessary to an umlerstanding of the device oi my invention, which is shown applied thereto; Fig. 2 is a transverse section of For. 1, show in; the page-end locking mechanism in in- (merative position; ljig. 3 is a view similar to Fig. 2, l)llt $ll()i\l1i$ tile {n ne-end locking mechanism in operative position; Fig. l is a sectional detail view of the rack and the adjustable pointerirryingg' stop carried thereby: and Fig. 5: is a detached perspective detail view of said adjustuhic stop.

Referring, now, in detail to the drawing: 1, l designate end supports, in which the shaft 2 of the typewriter platen 3 rotatably journaled, as usual. parts form no portion of my invention, and are well. known in the typewriter art, and, therefore. need no detailed description.

The platenshat't carries fast thereon, at one end thereof, in this instance the rigg l'ithand end, a gear-wheel 4, adapted to mesh with a rack 5, which, in this instance, is reciprocahly mounted, so as to slide long-itudinally, on a rod 6, which may he pivoted, at the front end thereof, as shown at T. to the right-hand end support l. The. rod ti may carry a suitable stop 8 to limit movement in one direction, that isrii'n'ward movement. of the rack The rack i3 is preferably provided, on its top, with a. longitiulinallyextending groove 9, in which is slidably carried a screwanember l0. Gil the portion of the threaded shank of said screw-member 10 which projects out of said groove 9 is screwed an. internally-threaded cap 11, carrying: a pointer 12. registering with a scale 13, comprising numbers printed or painted on the top of the right-hand end support 1, and extending longitudinally thereof. It will he evident that, by revolving. in one diree on, the cap 11 on the sired to insert a sheet of typewriting .25 in operative position on the platen 3,

One end of a coiled spring is secured to the rack 5 and the other end of said spring to the rod 6. i

A stop 24 may be carried by the right hand end support 1, to be engaged by the adjustable pointer-carrying stop 11 at the proper period in the rearwardreciprocation of the rack 5. v i

The typewriter paper-shelf 1a is provided, preferably toward its lower end, with 'a series of longitudinally-enter)ding'aperthree 15, registering with which are feelers in the form of anti-friction rollers 16, carried bv a rod 17, which is, in turn, carried,

' at its ends, by'cranlolevers 18, 18, projecting through apertures 19, 19, in said papershelf 11, and fulcruined to the latter in the the region of said apertures, as shown at 2'0, 20. veniently carry, at their otherwise tree extremities, or upper ends, handles or knobs 21, 21, for ready manipulation thereof. The rod 17' carries, at the end thereof nearest the rack 5, an upwardly curved projecting arm or leg 22, the tree upper end of which is adapted to engage the under surface 0 the rack 5, as shown in Figs. 1 and 2.

25 indicates a sheet of typewriti-ng paper in operative position upon the typewriter platen 3.

Operation: In operation, when it is depaper the operator presses downward upon the 'handles 21, which rocks the crank-levers 18, 18 on their fulcrums 20, 20, and moves paper-shell" ll, the arm the rod 17, with its rollers 16, in a. direction away from the paper-shelf 11, said rollers being thus caused to move out of the apertures 15. The paper 25 may then be slipped between said rollers 16 and the paper-she1f 1-1; thereupon, the handles 21 are released and the rollerslli fall back upon the paper 25, which prevents the rollers from falling, into said apertures 15 'until, in the line-spachigmovement of the typewriter, the paper moves from be neath said rollers. It will be noted that, as long as the rollers 16 are in engagement with the paper 25, 0., as long as the paper 25 is interposed between said rollers and the engagement with the rank 5, lifting the lat ter .as shown in Figs. 1 and 2 (most clearly and the screw 10. i ihile'the spedownward on spacing mechanism of Said crank-levers 18, 18 may con- 22 will be raised into messes in the latter), out of engagement with the rod 17, and the arm 22, rock on their flll crums, causing the rollers 16 to move into the apertures 15. This movement will, of course, release the arm from engagement with the rack 5,"which, by gravity, falls its pivot 7, into engagement'v with the gear-wheel 4. Thereafter, everymovement of the line spaeing mechanism of the typewriter, to rotate the platen. 3, will cause the rack, by reason .of its engagement with the gear-wheelie: carried fast on the platen-shaft 2, to move rearward, against' the tension of the spring 23, until the adjustable pointer-carrying stop 11 engages the stationary or fixed stop. 24, at which time further rotation of the platen-,by the linethe typewriter, will be prevented, and the platen will thus be locked against movement; This will indi cate to the operator that the end of the page 25 has been reached. ll 'lien the page 25 has been withdrawn from the platen and another sheet inserted, the arm '22 will once more engage and raise the rack 5 out of engagement with. the gear at, whereupon the spring 23 will automatically pull the rack 5' forward to initial position, 2'. 8., into engagement with the stop 8-. As will be seen, the adjustable pointercarrying stop 1.1 may be set at any desired point on the rack-bar 5,-within the limits of the slot 9, so that the locking of the platen may be etlected at varyingpoints, after the page-endloching mechanisn'i becomes initiallyop'eratire, by reason of the engagement of thoracic?) with the gear-wheel.

The scale 13, in connection with the pointer 12, indicates t the operator how many line-spacing moven'ients of the platen may be effected, after the rack engages the gear wheel 1, before the platen becomes locked against movementf Thus, in Fig. 1, the adjustable pointer-car-rying member or stop 11 is set so as to cause the pointer to register with the number 5 of the scale 13. This indicates to the operator that, after the rack 5 engages the wheel 1, live line-spacing movements of the platen 3 may be effected before the platen becomes locked against movement. (it course, two scales 13 be provided, one scale with the numbers nearer together than the other scale, to cor respond with halfspaeing movements of the platen, as will be readily understood.

With the above detailed description, taken in connection with the drawing, the many mi ght v gageable with said raradvantages of my invention wiil be apparent, especially to those skilled in the art to which this inrention appertains.

. iiaving thus tally described my invention. what I (claim as new, and desire to secure by Lettersiatent of the Ynited States is:

1-. In a page-end loelc ior typewriters, a platen-shaft: a gear-wheel carried fast thereon; a rack engagi eable with said gearwheel and having a longitudinally extending groove therein; and means for arresting movement of said raek at a predetern'iined period after engagement thereof with said gear-wheel, ooini'irising' a stop adjustably positioned in said groove.

in a page-end lock for typewriters, a platen-shaft; a gear-wheel carried fast thereon; a rack engageable with said gearwheel and having a hnigitadinallv-extend; ing groove therein; and two toiperating stops, one thereof eomiirisinga screwthreaded member seated in said groove and a cap-memlwr srrewed onto said screwthri. ided member.

3. in a page-end loel: for ty 'iew'riter I'Jlatki'l-Sllilfil a gear-wheel carried fast thereon; a rank eng ia'eable with said gearwheel and having a longitudinal] extending'groove therein; two eoiperating stops, one thereof eon'iprising a serew-threaded member seated in said groove and a pointercarrying eapn'iember screwed onto said screw-threaded member; and a scale eoiperaiing with said pointer.

in a. page-end loci: for typewriters, a platen-shaft; a geanwheel earried fast thereon; a rack engageable with said gearwheel; means for temporarily n'iaintaining the rack out of engagement with said gearwheel, including a. men'iber carrying rollers, and an arm carried by said meniber and enand means for airresting n'iovement of said rack at a predetermined period. after engagement thereof with said gear-wheel.

5, In a pa iplat en-sha'lt; a gear-wheel ,arried .ast thereon; a rack engageable with said gearwheel; means for temporarily maintaining the rack out of engagement with said gearwheel, comprising a men'iber earrying rollers, an arm earried'by said member and en'- gageable with said rack, and fnlerumed crank-levers carrying said member; and means for arresting movement of said ra'ei: at a predetermined period after engagement thereof with said gear-wheel.

5. in a page-end loci; for typewriters, a platen-shaft; a gear-wheel earr thereon; a rack engageable with said gearwheel; means for ten'iporari' maintaining the rack out of engagement with said gearwheel, includinga member carrying rollers,

and an arm carried by said member and engageable with said rack; a paper-shelf pro-- end loek'for ty writers. a-

vided with apertures ref'istering with said rollers: and means for arresting movement of said raek at a predetermined period at'ter engagement thereof with said gear-wheel.

T. in a pageend leek for typewriters, a platen-shalt; a gear-wheel carried fast thereon; a raelr engageable with said gearwheel; a paper-sheli havinga series of aperture aneans for ten'iporarily maintaining the rarlc out of engagen'ient with said gearwheel, including a member.earrying rollers registering with said apertures, an arm carried by said member and engageable with said rack, and crank-levers fuleruined on said paper-shelt and carrying said member;

and means for arresting movement of said rael; at a predetermined period aiter engagement thereof with said gear-wheel.

8, in a page-end lock for typewriters, a platei'i-shatt: a gear-wheel carried first therein; a rack engageable with said gearwheel" a paperehelt having a series of apertures; means for temporarily inaintainii'ig the l'Hli out of engagement with said gearwheel. eoi'nprising a member rarr \ingrollers registering with said apertures, an arm rarried by said member and engageable with said liiClC, and erai'ik-levers projeeting through and lull-ruined on said paper-shelf and carrying said inen'iber: and means for arresting); movement of said rack at a predetermined period after engagement thereof with said gear-wheel.

ii. in a 3 'e-end indieatii'ig device, the combination with a retatable platen. of a gear wheel connected to rotate when the platen is rotated, a rack i'novable. bodily into and out of mesh withsaid'gear wheel, a supporting member whereon said rack is mounted to slide'bodilygand means controlled by a work-sheet "for holding the rack out of en gagen'ient with said wheel until the ma sition.

10; In a pagoend indicating device, the combination with arotatable platen, of a gear wheel connected to-rotate when "the platen is rotated, a raeli i'i'iovable bodily into and out of mesh with said gear wheel, a supporting member whereon said rack is mounted to slide bodily, i aeans controlled by a work-sheet for holding the rael: out of engagement with said gear wheel until the worlesheet has reached a predetern'iined position, an. index Carried by said rack, and a cooperating scale.

1.1.111 a page-end indicating device, the eon'ibination with a rotatable platen, of a gezr wheel connected to rotate when the platen is rotated, a raelc movable bodily into and out of mesh with said'gear wheel, a supporting member whereon said raek is mounted to slide bodily, means controlled by a work-sheet for holding the rack out of engagement with-said gear Wheel until the WO1l\'-Sll8l has reached a predetermined po sition, and a stop for terminating the sliding movement of the rack and thereby limiting the extent of rotationof the platen permitted after said rack has engaged said gear wheel.

' 1;. In a page-end indicating'device, the combination with a rotatable platen, of a. gear wheel conneeted to rotate when the platen is rotated, a rack movable into and out of mesh with said gear wheel, a supporting member for Stlldl'llCli with which the rack has a sliding connection, means controlled by a work-sheet for holding the rack out of engagement with said gear wheel until the work-sheet has reached a predetermined position, a stop carried by said rack and adjustable therealong, a pointer adjustable with said step, a graduated scale over which said pointer moves, and a stop fixed with relation to said scale and in the path of said first-named stop.

"13. The combination with a rotary platen and a platen frame, of a gear wheel connected to rotate when the platen is rotated, a rack movable bodily into and out of mesh with said gear wheel, a supporting member for said rack pivoted to the platen frame and with which said rack has a straight-line sliding connection, and means controlled by a work-sheet to hold said rack out of engagement with the gear wheel until the work-sheet reaches a predetermined position.

14. The combination with a roller platen, ofa rear wheel connected thereto, a raclr movable into and out of mesh with the gear wheel, a pointer earriedby said rack, a scale over which said pointer moves, means controlled by a work-sheet for noranally holding said rack out of mesh with said gear wheel, and permitting it to move into mesh therewith when the worl-z-sheet reaches a predetermined position,

15. The combination with a roller platen,

of a gear wheel connected thereto, aswinging support, a rack slidably mounted thereon, means controlled by a work-sheet for holding said support and rack in inoperative position with the rack out of engage nent with the gear wheel, and permitting said support and rack to swing into position to engage the rack with said gear wheel when the work-sheet reaches a predetermined position, a pointer carried by said rack, a scale over which said pointer moves, a .stop moving with said pointer, and a connter-stop to engage said stop when the pointer reaches the zero point on the scale and thereby lock the platen against further rotation.

16. In a page-end indicating device, the combination with av platen frame and a vroller platen journaled thereon, of a gear Wheel connected to rotate with the platen,

a reel: movable into'and out of mesh with said wheel, a swinging support pivoted at its :torward end to the inner face of the 'platen frame end, said support and rack extending rearwardly from said pivot to" wheel connected to rotate with the platen,

a rack movable into and ont'of mesh with said gear wheel, a swinging support pivoted at its forward end to the inner face of the platen frame end, said support and rack extending reaiwvardly from said pivot to overhang said gear wheel, means con trolled by a work-sheet to hold said rack and support in inog'ierative position until the work-sheet reaches a predetermined position and then permit the rack'to drop into engagement with said gear wheel, indicating pointer adjustable along the rack,

- a graduated scale over which said pointer moves, a stop adjustable. with said'pointer, and a coiiperating counter-stop having afixed relation to the said scale to engage said stop and lock the platen against farther re tatio-n when the pointer reaches a predeter-' mined point along the scale.

18. The comhil'iation', with a platen, and a driving" element connected to rotate there with; of a iectilinearly-movable element to be driven by said driving; element; work-sheetcontrolled means normally hold ing said driven element in ineffective relation to said driving element, and permitting; said driven element to E'HOYG bodily into effective relation to said driving element when the work-sheet reaches a predeten mined position: I

19. The combination, with a platen, and a driving element ccnnected to rotate therewith; of a rectilinearlyanovable element to be driven by said driving element; worln slieet-controlled means normally holding said driven'element in ineffective relation to said driving element, and permitting 1 All 

